872513057 has 4 divisors (see below), whose sum is σ = 939629460. Its totient is φ = 805396656.

The previous prime is 872513017. The next prime is 872513069. The reversal of 872513057 is 750315278.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 750315278 = 2 ⋅375157639.

It can be written as a sum of positive squares in 2 ways, for example, as 519110656 + 353402401 = 22784^2 + 18799^2 .

It is a cyclic number.

It is not a de Polignac number, because 872513057 - 2¹² = 872508961 is a prime.

It is a super-2 number, since 2×872513057² = 1522558069270970498, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 872513057.

It is not an unprimeable number, because it can be changed into a prime (872513017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33558182 + ... + 33558207.

It is an arithmetic number, because the mean of its divisors is an integer number (234907365).

Almost surely, 2^872513057 is an apocalyptic number.

It is an amenable number.

872513057 is a deficient number, since it is larger than the sum of its proper divisors (67116403).

872513057 is a wasteful number, since it uses less digits than its factorization.

872513057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67116402.

The product of its (nonzero) digits is 58800, while the sum is 38.

The square root of 872513057 is about 29538.3319942071. The cubic root of 872513057 is about 955.5585694640.

The spelling of 872513057 in words is "eight hundred seventy-two million, five hundred thirteen thousand, fifty-seven".